[libc-commits] [libc] [libc][__support][bit] remove compiler has builtin checks (PR #81679)

[Guillaume Chatelet via libc-commits]

gchatelet wrote:

It seems to be OK for all the compilers and environments we support.
https://godbolt.org/z/Ez3jaxKqz

https://github.com/llvm/llvm-project/pull/81679